Merge remote-tracking branch 'remotes/kraxel/tags/audio-20210115-pull-request' into...
[qemu.git] / audio / ossaudio.c
1 /*
2 * QEMU OSS audio driver
3 *
4 * Copyright (c) 2003-2005 Vassili Karpov (malc)
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include <sys/ioctl.h>
27 #include <sys/soundcard.h>
28 #include "qemu/main-loop.h"
29 #include "qemu/module.h"
30 #include "qemu/host-utils.h"
31 #include "audio.h"
32 #include "trace.h"
33
34 #define AUDIO_CAP "oss"
35 #include "audio_int.h"
36
37 #if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
38 #define USE_DSP_POLICY
39 #endif
40
41 typedef struct OSSVoiceOut {
42 HWVoiceOut hw;
43 int fd;
44 int nfrags;
45 int fragsize;
46 int mmapped;
47 Audiodev *dev;
48 } OSSVoiceOut;
49
50 typedef struct OSSVoiceIn {
51 HWVoiceIn hw;
52 int fd;
53 int nfrags;
54 int fragsize;
55 Audiodev *dev;
56 } OSSVoiceIn;
57
58 struct oss_params {
59 int freq;
60 int fmt;
61 int nchannels;
62 int nfrags;
63 int fragsize;
64 };
65
66 static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
67 {
68 va_list ap;
69
70 va_start (ap, fmt);
71 AUD_vlog (AUDIO_CAP, fmt, ap);
72 va_end (ap);
73
74 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
75 }
76
77 static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
78 int err,
79 const char *typ,
80 const char *fmt,
81 ...
82 )
83 {
84 va_list ap;
85
86 AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
87
88 va_start (ap, fmt);
89 AUD_vlog (AUDIO_CAP, fmt, ap);
90 va_end (ap);
91
92 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
93 }
94
95 static void oss_anal_close (int *fdp)
96 {
97 int err;
98
99 qemu_set_fd_handler (*fdp, NULL, NULL, NULL);
100 err = close (*fdp);
101 if (err) {
102 oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
103 }
104 *fdp = -1;
105 }
106
107 static void oss_helper_poll_out (void *opaque)
108 {
109 AudioState *s = opaque;
110 audio_run(s, "oss_poll_out");
111 }
112
113 static void oss_helper_poll_in (void *opaque)
114 {
115 AudioState *s = opaque;
116 audio_run(s, "oss_poll_in");
117 }
118
119 static void oss_poll_out (HWVoiceOut *hw)
120 {
121 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
122
123 qemu_set_fd_handler(oss->fd, NULL, oss_helper_poll_out, hw->s);
124 }
125
126 static void oss_poll_in (HWVoiceIn *hw)
127 {
128 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
129
130 qemu_set_fd_handler(oss->fd, oss_helper_poll_in, NULL, hw->s);
131 }
132
133 static int aud_to_ossfmt (AudioFormat fmt, int endianness)
134 {
135 switch (fmt) {
136 case AUDIO_FORMAT_S8:
137 return AFMT_S8;
138
139 case AUDIO_FORMAT_U8:
140 return AFMT_U8;
141
142 case AUDIO_FORMAT_S16:
143 if (endianness) {
144 return AFMT_S16_BE;
145 } else {
146 return AFMT_S16_LE;
147 }
148
149 case AUDIO_FORMAT_U16:
150 if (endianness) {
151 return AFMT_U16_BE;
152 } else {
153 return AFMT_U16_LE;
154 }
155
156 default:
157 dolog ("Internal logic error: Bad audio format %d\n", fmt);
158 #ifdef DEBUG_AUDIO
159 abort ();
160 #endif
161 return AFMT_U8;
162 }
163 }
164
165 static int oss_to_audfmt (int ossfmt, AudioFormat *fmt, int *endianness)
166 {
167 switch (ossfmt) {
168 case AFMT_S8:
169 *endianness = 0;
170 *fmt = AUDIO_FORMAT_S8;
171 break;
172
173 case AFMT_U8:
174 *endianness = 0;
175 *fmt = AUDIO_FORMAT_U8;
176 break;
177
178 case AFMT_S16_LE:
179 *endianness = 0;
180 *fmt = AUDIO_FORMAT_S16;
181 break;
182
183 case AFMT_U16_LE:
184 *endianness = 0;
185 *fmt = AUDIO_FORMAT_U16;
186 break;
187
188 case AFMT_S16_BE:
189 *endianness = 1;
190 *fmt = AUDIO_FORMAT_S16;
191 break;
192
193 case AFMT_U16_BE:
194 *endianness = 1;
195 *fmt = AUDIO_FORMAT_U16;
196 break;
197
198 default:
199 dolog ("Unrecognized audio format %d\n", ossfmt);
200 return -1;
201 }
202
203 return 0;
204 }
205
206 #if defined DEBUG_MISMATCHES || defined DEBUG
207 static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
208 {
209 dolog ("parameter | requested value | obtained value\n");
210 dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
211 dolog ("channels | %10d | %10d\n",
212 req->nchannels, obt->nchannels);
213 dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
214 dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
215 dolog ("fragsize | %10d | %10d\n",
216 req->fragsize, obt->fragsize);
217 }
218 #endif
219
220 #ifdef USE_DSP_POLICY
221 static int oss_get_version (int fd, int *version, const char *typ)
222 {
223 if (ioctl (fd, OSS_GETVERSION, &version)) {
224 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
225 /*
226 * Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
227 * since 7.x, but currently only on the mixer device (or in
228 * the Linuxolator), and in the native version that part of
229 * the code is in fact never reached so the ioctl fails anyway.
230 * Until this is fixed, just check the errno and if its what
231 * FreeBSD's sound drivers return atm assume they are new enough.
232 */
233 if (errno == EINVAL) {
234 *version = 0x040000;
235 return 0;
236 }
237 #endif
238 oss_logerr2 (errno, typ, "Failed to get OSS version\n");
239 return -1;
240 }
241 return 0;
242 }
243 #endif
244
245 static int oss_open(int in, struct oss_params *req, audsettings *as,
246 struct oss_params *obt, int *pfd, Audiodev *dev)
247 {
248 AudiodevOssOptions *oopts = &dev->u.oss;
249 AudiodevOssPerDirectionOptions *opdo = in ? oopts->in : oopts->out;
250 int fd;
251 int oflags = (oopts->has_exclusive && oopts->exclusive) ? O_EXCL : 0;
252 audio_buf_info abinfo;
253 int fmt, freq, nchannels;
254 int setfragment = 1;
255 const char *dspname = opdo->has_dev ? opdo->dev : "/dev/dsp";
256 const char *typ = in ? "ADC" : "DAC";
257 #ifdef USE_DSP_POLICY
258 int policy = oopts->has_dsp_policy ? oopts->dsp_policy : 5;
259 #endif
260
261 /* Kludge needed to have working mmap on Linux */
262 oflags |= (oopts->has_try_mmap && oopts->try_mmap) ?
263 O_RDWR : (in ? O_RDONLY : O_WRONLY);
264
265 fd = open (dspname, oflags | O_NONBLOCK);
266 if (-1 == fd) {
267 oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
268 return -1;
269 }
270
271 freq = req->freq;
272 nchannels = req->nchannels;
273 fmt = req->fmt;
274 req->nfrags = opdo->has_buffer_count ? opdo->buffer_count : 4;
275 req->fragsize = audio_buffer_bytes(
276 qapi_AudiodevOssPerDirectionOptions_base(opdo), as, 23220);
277
278 if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
279 oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
280 goto err;
281 }
282
283 if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
284 oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
285 req->nchannels);
286 goto err;
287 }
288
289 if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
290 oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
291 goto err;
292 }
293
294 if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) {
295 oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
296 goto err;
297 }
298
299 #ifdef USE_DSP_POLICY
300 if (policy >= 0) {
301 int version;
302
303 if (!oss_get_version (fd, &version, typ)) {
304 trace_oss_version(version);
305
306 if (version >= 0x040000) {
307 int policy2 = policy;
308 if (ioctl(fd, SNDCTL_DSP_POLICY, &policy2)) {
309 oss_logerr2 (errno, typ,
310 "Failed to set timing policy to %d\n",
311 policy);
312 goto err;
313 }
314 setfragment = 0;
315 }
316 }
317 }
318 #endif
319
320 if (setfragment) {
321 int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize);
322 if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
323 oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
324 req->nfrags, req->fragsize);
325 goto err;
326 }
327 }
328
329 if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
330 oss_logerr2 (errno, typ, "Failed to get buffer length\n");
331 goto err;
332 }
333
334 if (!abinfo.fragstotal || !abinfo.fragsize) {
335 AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
336 abinfo.fragstotal, abinfo.fragsize, typ);
337 goto err;
338 }
339
340 obt->fmt = fmt;
341 obt->nchannels = nchannels;
342 obt->freq = freq;
343 obt->nfrags = abinfo.fragstotal;
344 obt->fragsize = abinfo.fragsize;
345 *pfd = fd;
346
347 #ifdef DEBUG_MISMATCHES
348 if ((req->fmt != obt->fmt) ||
349 (req->nchannels != obt->nchannels) ||
350 (req->freq != obt->freq) ||
351 (req->fragsize != obt->fragsize) ||
352 (req->nfrags != obt->nfrags)) {
353 dolog ("Audio parameters mismatch\n");
354 oss_dump_info (req, obt);
355 }
356 #endif
357
358 #ifdef DEBUG
359 oss_dump_info (req, obt);
360 #endif
361 return 0;
362
363 err:
364 oss_anal_close (&fd);
365 return -1;
366 }
367
368 static size_t oss_get_available_bytes(OSSVoiceOut *oss)
369 {
370 int err;
371 struct count_info cntinfo;
372 assert(oss->mmapped);
373
374 err = ioctl(oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
375 if (err < 0) {
376 oss_logerr(errno, "SNDCTL_DSP_GETOPTR failed\n");
377 return 0;
378 }
379
380 return audio_ring_dist(cntinfo.ptr, oss->hw.pos_emul, oss->hw.size_emul);
381 }
382
383 static void oss_run_buffer_out(HWVoiceOut *hw)
384 {
385 OSSVoiceOut *oss = (OSSVoiceOut *)hw;
386
387 if (!oss->mmapped) {
388 audio_generic_run_buffer_out(hw);
389 }
390 }
391
392 static void *oss_get_buffer_out(HWVoiceOut *hw, size_t *size)
393 {
394 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
395 if (oss->mmapped) {
396 *size = MIN(oss_get_available_bytes(oss), hw->size_emul - hw->pos_emul);
397 return hw->buf_emul + hw->pos_emul;
398 } else {
399 return audio_generic_get_buffer_out(hw, size);
400 }
401 }
402
403 static size_t oss_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
404 {
405 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
406 if (oss->mmapped) {
407 assert(buf == hw->buf_emul + hw->pos_emul && size < hw->size_emul);
408
409 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
410 return size;
411 } else {
412 return audio_generic_put_buffer_out(hw, buf, size);
413 }
414 }
415
416 static size_t oss_write(HWVoiceOut *hw, void *buf, size_t len)
417 {
418 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
419 size_t pos;
420
421 if (oss->mmapped) {
422 size_t total_len;
423 len = MIN(len, oss_get_available_bytes(oss));
424
425 total_len = len;
426 while (len) {
427 size_t to_copy = MIN(len, hw->size_emul - hw->pos_emul);
428 memcpy(hw->buf_emul + hw->pos_emul, buf, to_copy);
429
430 hw->pos_emul = (hw->pos_emul + to_copy) % hw->size_emul;
431 buf += to_copy;
432 len -= to_copy;
433 }
434 return total_len;
435 }
436
437 pos = 0;
438 while (len) {
439 ssize_t bytes_written;
440 void *pcm = advance(buf, pos);
441
442 bytes_written = write(oss->fd, pcm, len);
443 if (bytes_written < 0) {
444 if (errno != EAGAIN) {
445 oss_logerr(errno, "failed to write %zu bytes\n",
446 len);
447 }
448 return pos;
449 }
450
451 pos += bytes_written;
452 if (bytes_written < len) {
453 break;
454 }
455 len -= bytes_written;
456 }
457 return pos;
458 }
459
460 static void oss_fini_out (HWVoiceOut *hw)
461 {
462 int err;
463 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
464
465 ldebug ("oss_fini\n");
466 oss_anal_close (&oss->fd);
467
468 if (oss->mmapped && hw->buf_emul) {
469 err = munmap(hw->buf_emul, hw->size_emul);
470 if (err) {
471 oss_logerr(errno, "Failed to unmap buffer %p, size %zu\n",
472 hw->buf_emul, hw->size_emul);
473 }
474 hw->buf_emul = NULL;
475 }
476 }
477
478 static int oss_init_out(HWVoiceOut *hw, struct audsettings *as,
479 void *drv_opaque)
480 {
481 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
482 struct oss_params req, obt;
483 int endianness;
484 int err;
485 int fd;
486 AudioFormat effective_fmt;
487 struct audsettings obt_as;
488 Audiodev *dev = drv_opaque;
489 AudiodevOssOptions *oopts = &dev->u.oss;
490
491 oss->fd = -1;
492
493 req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
494 req.freq = as->freq;
495 req.nchannels = as->nchannels;
496
497 if (oss_open(0, &req, as, &obt, &fd, dev)) {
498 return -1;
499 }
500
501 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
502 if (err) {
503 oss_anal_close (&fd);
504 return -1;
505 }
506
507 obt_as.freq = obt.freq;
508 obt_as.nchannels = obt.nchannels;
509 obt_as.fmt = effective_fmt;
510 obt_as.endianness = endianness;
511
512 audio_pcm_init_info (&hw->info, &obt_as);
513 oss->nfrags = obt.nfrags;
514 oss->fragsize = obt.fragsize;
515
516 if (obt.nfrags * obt.fragsize % hw->info.bytes_per_frame) {
517 dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
518 obt.nfrags * obt.fragsize, hw->info.bytes_per_frame);
519 }
520
521 hw->samples = (obt.nfrags * obt.fragsize) / hw->info.bytes_per_frame;
522
523 oss->mmapped = 0;
524 if (oopts->has_try_mmap && oopts->try_mmap) {
525 hw->size_emul = hw->samples * hw->info.bytes_per_frame;
526 hw->buf_emul = mmap(
527 NULL,
528 hw->size_emul,
529 PROT_READ | PROT_WRITE,
530 MAP_SHARED,
531 fd,
532 0
533 );
534 if (hw->buf_emul == MAP_FAILED) {
535 oss_logerr(errno, "Failed to map %zu bytes of DAC\n",
536 hw->size_emul);
537 hw->buf_emul = NULL;
538 } else {
539 int err;
540 int trig = 0;
541 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
542 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
543 } else {
544 trig = PCM_ENABLE_OUTPUT;
545 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
546 oss_logerr (
547 errno,
548 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
549 );
550 } else {
551 oss->mmapped = 1;
552 }
553 }
554
555 if (!oss->mmapped) {
556 err = munmap(hw->buf_emul, hw->size_emul);
557 if (err) {
558 oss_logerr(errno, "Failed to unmap buffer %p size %zu\n",
559 hw->buf_emul, hw->size_emul);
560 }
561 hw->buf_emul = NULL;
562 }
563 }
564 }
565
566 oss->fd = fd;
567 oss->dev = dev;
568 return 0;
569 }
570
571 static void oss_enable_out(HWVoiceOut *hw, bool enable)
572 {
573 int trig;
574 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
575 AudiodevOssPerDirectionOptions *opdo = oss->dev->u.oss.out;
576
577 if (enable) {
578 hw->poll_mode = opdo->try_poll;
579
580 ldebug("enabling voice\n");
581 if (hw->poll_mode) {
582 oss_poll_out(hw);
583 }
584
585 if (!oss->mmapped) {
586 return;
587 }
588
589 audio_pcm_info_clear_buf(&hw->info, hw->buf_emul, hw->samples);
590 trig = PCM_ENABLE_OUTPUT;
591 if (ioctl(oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
592 oss_logerr(errno,
593 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n");
594 return;
595 }
596 } else {
597 if (hw->poll_mode) {
598 qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
599 hw->poll_mode = 0;
600 }
601
602 if (!oss->mmapped) {
603 return;
604 }
605
606 ldebug ("disabling voice\n");
607 trig = 0;
608 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
609 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
610 return;
611 }
612 }
613 }
614
615 static int oss_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
616 {
617 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
618 struct oss_params req, obt;
619 int endianness;
620 int err;
621 int fd;
622 AudioFormat effective_fmt;
623 struct audsettings obt_as;
624 Audiodev *dev = drv_opaque;
625
626 oss->fd = -1;
627
628 req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
629 req.freq = as->freq;
630 req.nchannels = as->nchannels;
631 if (oss_open(1, &req, as, &obt, &fd, dev)) {
632 return -1;
633 }
634
635 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
636 if (err) {
637 oss_anal_close (&fd);
638 return -1;
639 }
640
641 obt_as.freq = obt.freq;
642 obt_as.nchannels = obt.nchannels;
643 obt_as.fmt = effective_fmt;
644 obt_as.endianness = endianness;
645
646 audio_pcm_init_info (&hw->info, &obt_as);
647 oss->nfrags = obt.nfrags;
648 oss->fragsize = obt.fragsize;
649
650 if (obt.nfrags * obt.fragsize % hw->info.bytes_per_frame) {
651 dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
652 obt.nfrags * obt.fragsize, hw->info.bytes_per_frame);
653 }
654
655 hw->samples = (obt.nfrags * obt.fragsize) / hw->info.bytes_per_frame;
656
657 oss->fd = fd;
658 oss->dev = dev;
659 return 0;
660 }
661
662 static void oss_fini_in (HWVoiceIn *hw)
663 {
664 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
665
666 oss_anal_close (&oss->fd);
667 }
668
669 static size_t oss_read(HWVoiceIn *hw, void *buf, size_t len)
670 {
671 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
672 size_t pos = 0;
673
674 while (len) {
675 ssize_t nread;
676
677 void *dst = advance(buf, pos);
678 nread = read(oss->fd, dst, len);
679
680 if (nread == -1) {
681 switch (errno) {
682 case EINTR:
683 case EAGAIN:
684 break;
685 default:
686 oss_logerr(errno, "Failed to read %zu bytes of audio (to %p)\n",
687 len, dst);
688 break;
689 }
690 break;
691 }
692
693 pos += nread;
694 len -= nread;
695 }
696
697 return pos;
698 }
699
700 static void oss_enable_in(HWVoiceIn *hw, bool enable)
701 {
702 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
703 AudiodevOssPerDirectionOptions *opdo = oss->dev->u.oss.out;
704
705 if (enable) {
706 hw->poll_mode = opdo->try_poll;
707
708 if (hw->poll_mode) {
709 oss_poll_in(hw);
710 }
711 } else {
712 if (hw->poll_mode) {
713 qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
714 hw->poll_mode = 0;
715 }
716 }
717 }
718
719 static void oss_init_per_direction(AudiodevOssPerDirectionOptions *opdo)
720 {
721 if (!opdo->has_try_poll) {
722 opdo->try_poll = true;
723 opdo->has_try_poll = true;
724 }
725 }
726
727 static void *oss_audio_init(Audiodev *dev)
728 {
729 AudiodevOssOptions *oopts;
730 assert(dev->driver == AUDIODEV_DRIVER_OSS);
731
732 oopts = &dev->u.oss;
733 oss_init_per_direction(oopts->in);
734 oss_init_per_direction(oopts->out);
735
736 if (access(oopts->in->has_dev ? oopts->in->dev : "/dev/dsp",
737 R_OK | W_OK) < 0 ||
738 access(oopts->out->has_dev ? oopts->out->dev : "/dev/dsp",
739 R_OK | W_OK) < 0) {
740 return NULL;
741 }
742 return dev;
743 }
744
745 static void oss_audio_fini (void *opaque)
746 {
747 }
748
749 static struct audio_pcm_ops oss_pcm_ops = {
750 .init_out = oss_init_out,
751 .fini_out = oss_fini_out,
752 .write = oss_write,
753 .run_buffer_out = oss_run_buffer_out,
754 .get_buffer_out = oss_get_buffer_out,
755 .put_buffer_out = oss_put_buffer_out,
756 .enable_out = oss_enable_out,
757
758 .init_in = oss_init_in,
759 .fini_in = oss_fini_in,
760 .read = oss_read,
761 .run_buffer_in = audio_generic_run_buffer_in,
762 .enable_in = oss_enable_in
763 };
764
765 static struct audio_driver oss_audio_driver = {
766 .name = "oss",
767 .descr = "OSS http://www.opensound.com",
768 .init = oss_audio_init,
769 .fini = oss_audio_fini,
770 .pcm_ops = &oss_pcm_ops,
771 .can_be_default = 1,
772 .max_voices_out = INT_MAX,
773 .max_voices_in = INT_MAX,
774 .voice_size_out = sizeof (OSSVoiceOut),
775 .voice_size_in = sizeof (OSSVoiceIn)
776 };
777
778 static void register_audio_oss(void)
779 {
780 audio_driver_register(&oss_audio_driver);
781 }
782 type_init(register_audio_oss);